山西省土地沙质荒漠化现状及发展趋势研究

山西省的晋西北和大同地区是全国荒漠化监测与防治的重点地区之一,也是环京津唐地区防风固沙、绿色生态屏障建设的重点地区之一.该区由风力侵蚀形成的沙质荒漠化土地分布集中,且危害较为严重.沙质荒漠化土地的发生与扩展是自然因素和人为因素综合作用的结果,气候干旱多风、地表沙物质丰富和植被稀疏等自然因素的存在,本身就孕育着沙质荒漠化发生与发展的自然过程,即沙质荒漠化的自然过程,而人类不合理的经济活动则是叠加在沙质荒漠化自然过程的基础上起加速、加剧作用,即沙质荒漠化的人为加速过程.动态监测资料表明流动沙地面积有增加趋势,在未来中国北方气候变暖干化背景下,随着人类活动的加强该区沙质荒漠化有加速发展的趋势,应引起高度重视.

Study on Sandy Desertification of Present Situation and Developmental Trend in Shanxi Province

Land desertification is one of the most serious global eco-environment problem which limits the development of society and economy at present. Here,based on the results of recent investigations, we analyzes the present situation and cause of sandy desertification in Shanxi province. Sandy desertification land are mainly distributed in the northwestern and Datong basin of Shanxi,it covers 70. OX104 hm2,accounting about 30. 4% of the total land of this area. The study results show that the processes of sand desertification which occurred or development -ed at this area are mainly caused by natural factors (such as climatic condition and fragile ecological environments) and the human unreasonable economical ac'tivities. In order word,Sandy desertification situation in Shanxi province are related to the physical process caused by natural factors and to the human accelerative process caused by human factors. At the some time,sandy desertification land in the future in the northwestern and Datong basin of Shanxi will be expanded under climate warming and rapid increase of population,unreasonable economical activities.